Improved Preparative Method for 1,2-Diaryl-3,4-diphosphinidenecyclobutenes and Its Application to the Studies of 1,2-Bis(arylthienyl)-3,4-diphosphinidenecyclobutenes
Improved Preparative Method for 1,2-Diaryl-3,4-diphosphinidenecyclobutenes and Its Application to the Studies of 1,2-Bis(arylthienyl)-3,4-diphosphinidenecyclobutenes
作者:Kozo Toyota、Keiko Horikawa、Rader S. Jensen、Kouhei Omori、Subaru Kawasaki、Shigekazu Ito、Masaaki Yoshifuji、Noboru Morita
DOI:10.1246/bcsj.80.1580
日期:2007.8.15
Sterically protected 1,2-diaryl-3,4-diphosphinidenecyclobutenes were prepared from 3-aryl-2-bromo-1-(2,4,6-tri-t-butylphenyl)-3-(trimethylsiloxy)-1-phosphapropene using t-butyllithium and 1,2-dibromoethane, and the properties of the products, such as 1,2-di(2,2′-bithienyl-5-yl)-3,4-diphosphinidenecyclobutene, were studied. This method is an excellent method for preparing these compounds.